>  From the user's point of view one of the most serious disadvantages of
> the current Jmol version is the strange internal mechanism for
> protein secondary structure determination.

I agree completely. It is broken.

> One example is the structure 1srb.

No examples are necessary

> RasMol/Chime give for all 10 models one helix in the middle of the
> sequence.
> On the contrary, Jmol yields
> Model   Sheets (S), Helices (H)
> 1               2 S
> 2               2S,1H
> 3               0S,0H
> 4               1S
> 5               1S
> 6               2S
> 7               1S,1H
> 8               1S
> 9               2S
> 10             2S
>
> You may want to contact G. Vriend at the CMBI in Nijmegen/The Netherlands.
> He seems to take care of the DSSP program written by W. Kabsch and C.
> Sander.
> (http://swift.cmbi.ru.nl/gv/dssp/).

I contacted Gert several years ago, explained Jmol, and asked for his
assistance. He explained that he was only the 'keeper' of the code and
that he was not authorized to approve the release of the code for use
under an open source license. He said that I needed to get approval from
Chris Sander.

I subsequently exchanged some emails with Chris Sander. In the end, I was
unable to get approval for them to release the source code to me so that I
could reimplement it in Java for use in Jmol under the GNU LGPL.

After that experience I spent quite some time sending emails to authors of
other programs for automatic identification of protein secondary
structure.

Several replied to my emails ... and I was optimistic that someone would
help me out. Unfortunately, none of them followed through on their
respones.

I then spent several weeks reading research papers, but was unable to
understand enough of the algorithms to build a decent implementation.


My current position is as follows:

Some else needs to lead the effort to get automatic identification of
protein secondary structures built into Jmol. I believe that this needs to
be someone who understands the problem and has implementation experience.

I will certainly support the effort in any way that I can, but I will not
lead the effort.



Miguel



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